Apparatus for conserving energy in electrical appliances

ABSTRACT

An apparatus for connecting and disconnecting appliances to an electrical supply, responsive to door activated switch means. A transmitter responds to entrance into a room by causing a receiver to activate a connecting means supplying an appliance with electrical energy. Upon closure of the door, a deadbolt must be engaged within the room within a predetermined period to maintain the appliances in their energized states. Release of the deadbolt to exit from the room causes the transmitter to enter a delay sequence, thereby providing an occupant with sufficient time to exit prior to de-energizing the appliances. Subsequent thereto, a signal is transmitted to the receiver for shutdown of the appliances. An overriding thermostat is provided to control heating and cooling appliances responsive to the transmitter, the thermostat having a broader thermal zone of operation than a typical thermostat controlling the heating and cooling appliances in the presence of the room occupant. An occupant-activated switch is provided to override the deadbolt and control the transmitter under certain circumstances.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation-in-part of a prior application, Ser. No. 797,382, filed on May 16, 1977, and now Grimes et al U.S. Pat. No. 4,101,886.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a means for controlling and conserving the usage of energy, particularly of electrical energy by appliances operative in a room provided as an accommodation for a guest occupant. More specifically, a device is disclosed for controlling a plurality of appliances responsive to the presence or absence of the occupant, particularly as detected by door-activated switches.

2. Description of the Prior Art

While prior art devices tending to control air conditioning and heating devices responsive to opening of windows are known, e.g. Dageford U.S. Pat. No. 3,729,735, such devices function irrespective of the presence in a room of its occupant. The major concern therein is to avoid heating of cool external air, or cooling of warm external air brought in through an open window.

However, such devices do not pertain to a solution of the problem of guest comfort existing within the lodging industry. Specifically, guests are ordinarily supplied with appliances utilizing electrical energy which affect lighting, provide television and other amenities, and heat and cool the occupied room. However, guests are known to leave rooms after having availed themselves of the room comforts without disconnecting the various appliances or readjusting heating and cooling thermostats to acceptable levels for the unoccupied room prior to leaving.

Thus, while the majority of the time which a guest rents a room is spent by the guest externally of that room, electrical energy consumption continues throughout the period in many cases as if the guest were still present.

SUMMARY OF THE INVENTION

Accordingly, it is an object of this invention to provide an apparatus for controlling and conserving usage of electrical power in the absence of an occupant of a room.

Another object is to minimize usage of electrical power, yet to maintain a room in a habitable temperature range.

Yet another object is to provide for the disconnection of appliances from a source of electrical power responsive to opening of a deadbolt on a door.

A further object is to provide sufficient time for an occupant to leave a room subsequent to throwing a deadbolt on a door prior to disconnecting appliances from an electrical source therefor.

An additional object is to connect appliances within a room to a source of electrical energy therefor responsive to opening a door leading into the room.

Yet another object is to connect and disconnect appliances from a source of electrical energy therefor by the use of transmitting and receiving means, the transmitting means activated by switches responsive to door opening and deadbolt throwing.

A further object is to transmit ultrasonic signals for controlling receivers ultimately to disconnect or connect appliances to a source of electrical energy.

Another object is to use radio frequency signals for controlling means connecting and disconnecting electrical appliances to sources of electrical energy.

An additional object is to combine room security with an energy conservation device.

A further object is to provide an energy conservation system responsive to entry into and exit from a room.

These and other objects and advantages of the present invention will become apparent to those skilled in the art by reference to the following description of preferred embodiments thereof when taken in conjunction with the accompanying drawings wherein like reference characters refer to like elements throughout the views.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view of a guest room incorporating the present invention;

FIG. 2 is a block diagram representing the present invention;

FIG. 3 is a circuit diagram of the transmitter; and

FIG. 4 is a circuit diagram of a control and connecting means for a thermostatically controlled appliance.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

In accordance with the objectives hereinabove set forth, the present invention is utilized in a room as shown in FIG. 1. A transmitter 10, activated by switches 12 or 14 through wiring connections 15, transmits signals which may be of any convenient form, including sonic, ultrasonic, rf, or optical, for example, to receivers 16 associated with various appliances 17, such as a television 17a, various lights 17b, burglar, fire or smoke alarms (not shown), and/or heating and cooling instruments 17c. The signals may also be transmitted directly over connecting wires between the transmitter and the receivers. The presently preferred embodiment contemplates the use of FSK (frequency-shift-keyed) rf signals to communicate between the transmitter and the receivers. Similarly, wiring connections 15 between sensing switches 12 and 14, and transmitter 10 may be replaced by other means of communication, such as rf signaling etc. In addition, an override switch 11 may be provided to override the operation of switch 12. In FIG. 1 it is shown physically located at the transmitter, but it should be understood that it may be located at any convenient place within the room, or in close proximity thereto. It may be connected to the transmitter by wires or any other suitable means.

Receivers 16 control the connection of the appliances 17 associated therewith to energy sources. The energy sources may be electrical outlets 18, to which the appliances are connected through normal wiring 20. Clearly, it is contemplated that other sources of energy which may be provided to a room occupant are also within the scope of this invention.

Referring now to FIG. 2, transmitter 10 is activated by a deadbolt switch 12 to transmit a signal to receiver 16 for disconnecting the appliances associated therewith from energy source 18. This signal is transmitted upon disengagement of the deadbolt 12, such as is commonly done prior to opening door 22 for the purpose of leaving the room. The deadbolt is mounted on the interior side of door 22 and is combined with switch 12 to provide both security and the present energy conserving feature. It is appreciated, however, that the switch 12 may be independent of the deadbolt and may be located anywhere within the room and still provide the energy conservation features discussed infra. A delay means IC2, shown in FIG. 3, provides a 21/2 minute delay prior to transmission of the "turn-off" signal by transmitter 10 subsequent to release of deadbolt 12 and the attendant activity of switch 12.

However, under some circumstances, it is desirable to be able to override the operation of the deadbolt, that is, to maintain the transmitter in its activated condition regardless of the position of the deadbolt 12. Such a condition occurs, as for example, where there are two occupants in the room and one desires to leave. Upon the releasing of the deadbolt and the opening of the door, the count down towards transmission of a "turn-off" signal by transmitter 10 would begin. However, this "turn-off" signal can be defeated by activating the override switch 11 which directly activates the transmitter to maintain its activated state. This switch 11 may be nothing more than a momentary-contact pushbutton switch connected in a known manner to the circuit of transmitter 10. Another instance where it is desirable to provide such an override switch 11, is where, for example, an occupant has recently entered the room and desires to leave the deadbolt in a released position because he is expecting other persons momentarily. Without the provision of override switch 11, all of the appliances controlled by the transmitter 10 would shortly be turned off. The override switch 11 allows the occupant to avoid such a result. This override switch 11 may also be connected in such a manner as to override timer IC2, as is hereinafter described with reference to the operation of switch S2 in the discussion of FIG. 3.

Turning now to FIG. 3, switches S1 and S2, both being double-pole-double-throw switches, are shown. Switch S1 represents the door activated switch and is shown in the door open position, while switch S2 represents the deadbolt activated switch and is shown in the open deadbolt position. The switches are activated responsive to engagement or disengagement of the deadbolt and opening or closing of the door. It is recognized that switch S1 may be independent of door 22 and, may instead, be associated with a manually operable switching means, a pushbutton, or even with the lock used to gain entry to the room. Moreover, while switches S1 and S2 are shown as double-pole-double-throw switches, other switch configurations may be used as is apparent to those of ordinary skill in the art. Particularly, it is possible to utilize single pole switches in combination with logic devices to perform the functions of illustrated switches S1 and S2.

It is additionally within the scope of the present invention to utilize means other than a door and a deadbolt to detect an occupant's entrance to or exit from a room and to activate energy conserving means thereby. The present door and deadbolt associated switches are part of the presently preferred embodiment, but do not limit the invention thereto.

Responsive to opening of the door for the purpose of ingress to the room, switch S1, placed in the contact position shown, provides a signal to timing circuit IC1 to provide a 5 second timing pulse for the purpose of transmitting a "turn-on" signal by transmitter module 24. The transmitter module used herein is typically available as Model 22 manufactured by Linear Corporation in Glendale, Calif.

When door 22 is closed and the S1 contact arms are placed in their alternative position, with switch S2 still representing the open deadbolt, a 21/2 minute delay pulse is provided by circuit IC2, which subsequently causes a 10 second pulse to be transmitted by transmitter module 24, causing the appliances to be turned off.

When switch S2 is closed, representing the engaged deadbolt position, timer IC2 is overriden and a constant ON signal is provided to the transmitter for the purpose of permitting normal operation of the room appliances 17. The receivers accordingly control the connecting means to provide constant connection of the appliances and the energy sources therefor. As a further feature of the invention, circuit IC3 is provided for the purpose of indicating to the room occupant, by means of speaker SPK1, that the 21/2 minute delay is expiring, and that the deadbolt should be engaged, lest the appliances be turned off. A gentle beep signal is thus provided within 21/2 minutes of the time an occupant enters a room, closes the door and neglects to engage the deadbolt. In those circumstances, it follows from the preceding description that timing circuit IC2 provides a 21/2 minute delay prior to transmission of a signal to disconnect the appliances. Nonetheless, in the event that the occupant neglects to throw the deadbolt, one lighting appliance, shown as lamp 28 in FIG. 1, is provided without a receiver and control means, and remains unaffected by the transmitter and is directly connected to its source of energy. Accordingly, even in the event that an occupant neglects to engage his deadbolt, sufficient lighting remains within the room to permit correction of the error.

Turning now to FIG. 4, a receiver means 16 including and incorporating a control and a connecting means is shown, particularly for control of a heating and cooling unit. A receiving module 26, comprising for example receiver Model 61S, available from Linear Corporation in Glendale, Calif., receives the signals transmitted by transmitter 10. The decoded signal is used in the control means to energize and engage relays RY31 and RY32, activating the heating and cooling units, responsive to thermal sensors IC31 and IC32. Simultaneously, relay RY33 overrides and disconnects the room thermostat (not shown).

Thus, while other appliances such as 17a and 17b are disconnected, heating and cooling means 17c are reconnected to overriding thermostats which respond to different settings than provided by the occupant on his normal room thermostat. For example, where normal comfort settings may be in the range of 68° F. to 72° F., the present invention provides for a setting of 65° F. to 78° F. in the occupant's absence from the room. That is, the heating unit will not turn on until the temperature drops below 65° F., and continue to function as needed to maintain that temperature. A cooling unit will not turn on until the temperature rises above 78° F., and continue to function as needed to maintain that temperature. Of course, different temperature values may be utilized.

Similar control and connecting means are provided for other appliances. Specifically, protection systems, such as burglar, fire and smoke detectors, may be connected in a similar manner such that while other appliances such as 17a and 17b are disconnected, and heating and cooling means 17c are reconnected, such protection means are also reconnected to an energy source, so that they then provide their desired protection. The use of such protective devices would most usually occur in a home or apartment situation, but may also be utilized to a lesser extent in a hotel room environment. Desiring to protect his property and possessions in his absence, the occupant of a house, apartment, condominium, motel room or other similar structure, whether used for business, pleasure or as a residence, may activate a manually operable switch, similar to that of override switch 11, to activate such protection devices upon his leaving. These devices would then be connected to a source of energy, and would protect the premises in the desired manner. Under these conditions, such an occupant-activated switch may be as simple as an on-off switch connected directly to the transmitter, or may be operated in a fashion similar to that of the presently existing remote controlled garage door openers.

The specific wiring connections for effecting control over the appliance responsive to reception of a signal by a particular receiver are similar to the connections of FIG. 4, but are not shown herein.

Tables 1 and 2 below provide a listing of components used in FIGS. 3 and 4, respectively. The various components are selected to perform the desired circuit functions. As is apparent to the routineers in the art, other components may be selected and other circuit configurations used without departing from the scope of the invention.

                  TABLE 1                                                          ______________________________________                                         TRANSMITTER COMPONENTS                                                         IC1              NE555v or equivalent Timer IC                                 IC2, IC3         NE556 or equivalent Timer IC                                  IC4              Ua78GUIC Voltage Reg. IC                                      Q1, Q2           2N3904 or equivalent Transistor                               D1, D2, D3       1N914 Diode                                                   D4               1N4006 or equivalent Diode                                    RY1              147-IC-12D Allied No. 802-1960                                                 12v DC Relay                                                  T1               F-139P 12v Transformer                                        SO1              Moles 6 Pin Connector                                         BR1              100v 1.5amp Bridge React.                                     S1               Door Switch DPDT                                              S2               Door Bolt Switch DPDT                                         SPK1             Speaker 8 Min.                                                F1               Fuse 1 Amp & Holder                                           C17              470 uf 50v Cap. Elect.                                        C2, C5, C16      .1 uf Disc. cap.                                              C5, C7, C11      .01 uf Disc. cap.                                             C1, C6, C8, C12  .47 uf TAT. Cap.                                              C15              .02 uf Disc. Cap.                                             C3               10 uf TAT Cap. Elect.                                         C9, C14          100 uf TAT Cap. Elect.                                        C10, C13         4.7 uf TAT Cap. Elect.                                        R1, R2, R6, R11, R7, R19                                                                        5.1K Resistor 5% 1/4W                                         R4, R12          1K Resistor 5% 1/4W                                           R5, R10          1 Meg. Resistor 5% 1/4W                                       R8, R16          10K Resistor 5% 1/4W                                          R9               15K Resistor 5% 1/4W                                          R3               220K Resistor 5% 1/4W                                         R13              27K Resistor 5% 1/4W                                          R14              330K Resistor 5% 1/4W                                         R17              .00K Resistor 5% 1/4W                                         R15              4.7K 5% 1/4W                                                  R18              25K Trimmer Pot                                               Model 22         Transmitter Linear Corp.                                      ______________________________________                                    

                  TABLE II                                                         ______________________________________                                         RECEIVER COMPONENTS                                                            IC31, IC32     LM 3911-46 TEMP.                                                               CONTROLLER IC                                                   IC33, IC34     NE55v TIMER IC                                                  IC35           MC7812P IC REG.                                                 Q31, Q32, Q34, Q36, Q33                                                                       2N3904 or EQUIVALENT                                                           TRANSISTOR                                                      Q35            2N3906 or equiv. TRANSISTOR                                     D31, D32, D33, D35                                                                            1N4006 or equiv. DIODE                                          D34            1N914 DIODE                                                     RY31, RY32, RY34                                                                              802-1960 12v RELAY                                                             SPDT ALLIED                                                     RY33           886-1355 12v RELAY                                                             4PDT ALLIED                                                     BR31           100v 1.5 amp BRIDGE RECT.                                       T31            24 VAC 450 ma. TRANSFORMER                                                     PLUG-IN-WALL                                                    F31            2 amp. FUSE and HOLDER                                          SO31           9 PIN MOLEX SOCKET                                              C39            470 uf 50v ELECT. CAP.                                          C38            .1 uf DISC. CAP.                                                C32            10 uf 25v ELECT. CAP                                            C31            .47 uf TAT ELECT. CAP.                                          C33, C37       .01 uf DISC. CAP.                                               C34            100 uf 35v ELECT. CAP.                                          C35            47 uf 25v ELECT. CAP.                                           C36            4.7 uf 25v ELECT. CAP.                                          R42, R51       1K 5% 1/4W RESISTOR                                             R43            220K 5% 1/4W RESISTOR                                           R41, R44       5.1K 5% 1/4W RESISTOR                                           R33, R35, R45, R53                                                                            5% 1/4W RESISTOR                                                R50            1 MEG. 5% 1/4W RESISTOR                                         R46            2.2K 5% 1/4W RESISTOR                                           R38, R39, R47, R49, R52                                                                       3.3K 5% 1/4W RESISTOR                                           R32, R34       20K 5% 1/4W RESISTOR                                            R31, R36       22 MEG. 5% 1/4W RESISTOR                                        R37, R40, R48  100K TRIMMER POT                                                RECEIVER MODEL                                                                 61S LINEAR CORP.                                                               ______________________________________                                    

In operation, a room occupant is given an instruction card on checking into a room. Use of the energy conservation device is disclosed therein, and instructions provided to engage deadbolt 12 upon entry into the room. An occupant following the instructions thus provides, within 21/2 minutes of closing door 22, for switch S2 of FIG. 4 to override the timing circuits IC2 and maintain continual connection of the appliances 16 to their energy sources 18. A careless occupant who neglects to engage the deadbolt is reminded by the gentle beep sound emanating from speaker SPK1 that the delay period is over and that the deadbolt ought to be engaged.

Having engaged the deadbolt, the occupant may then proceed to control the appliances as he normally would, including setting of various temperature levels for the thermostatic controls to match his comfort level, lighting various lamps and activating a television set or other appliance provided for his comfort. On leaving the room, it has been the practice of hotel and motel occupants occasionally to leave the appliances connected, without bothering to disconnect same, thereby to waste energy. With the present invention utilized in such a room, release of the deadbolt to leave the room causes a 21/2 minute delay sequence to be entered by circuit IC2, subsequently providing a signal by transmitter 10 to disconnect the various appliances from their energy source. Accordingly, sufficient time is provided for the guest to depart the room prior to disconnecting the appliances. Simultaneously with such disconnection, the heating and cooling appliances are placed under the control of auxiliary thermostats provided to maintain the room at temperature levels which are more conservative in energy consumption.

Subsequent reentry by the guest into the room causes the door activated switch S1 to trigger timer IC1 thereby providing a 5 second signal to reconnect the appliances and restore the heating and cooling units to their normal thermostatic control. Upon closing of the door subsequent to entry, the sequence repeats as previously disclosed herein.

Inasmuch as frequency shift keying is contemplated as the mode of signal transmission, it is possible to provide a different code for the transmitter of each room to be controlled by the occupant thereof upon ingress thereto or egress therefrom.

While preferred embodiments have been described herein, many variations thereof will become apparent to those with ordinary skill in the art. Such variations are within the scope of the present invention as recited in the appended claims. 

We claim:
 1. A device for conserving energy consumption by appliances within a room having a door when the room is unoccupied by an occupant, which device comprises:(a) a source of energy; (b) means for connecting the appliances to the source of energy; (c) control means for causing the connecting means to connect or disconnect the appliances and the source of energy; (d) sensing means responsive to the ingress to and egress from the room by the occupant, which sensing means includes;(1) first switch means responsive to activation by the occupant, and (2) second switch means responsive to the opening and closing of the door; (e) wireless transmitting means activated and inhibited by the sensing means for wireless transmitting control signals to the control means, thereby causing the appliances to be connected to or disconnected from the source of energy responsive to the ingress to or egress from the room by the occupant; and (f) third switch means responsive to activation by the occupant for activating said transmitting means in the absence of the activating of said transmitting means by said sensing means.
 2. A device as recited in claim 1 wherein said transmitting means transmits ultrasonic control signals to said control means.
 3. A device as recited in claim 1 wherein said transmitting means transmits radio frequency control signals.
 4. A device as recited in claim 3 wherein said radio frequency control signals are transmitted in a frequency shift key code.
 5. A device as recited in claim 1 wherein each appliance has its own control means.
 6. A device as recited in claim 1 wherein said transmitting means comprises delay means for delaying transmission of said control signals to said control means.
 7. A device for conserving energy consumption by appliances within a room having a door and deadbolt thereon when the room is unoccupied by an occupant, which device comprises:(a) a source of energy; (b) means for connecting the appliances to the source of energy; (c) control means for causing the connecting means to connect or disconnect the appliances and the source of energy; (d) sensing means responsive to the ingress to and egress from the room by the occupant, which sensing means includes:(1) first switch means activated by the deadbolt; and (2) second switch means responsive to opening and closing of the door in the room; (e) transmitting means activated and inhibited by the sensing means for transmitting control signals to the control means thereby causing the appliances to be connected to or disconnected from the source of energy responsive to the ingress to or egress from the room by the occupant; (f) third switch means responsive to activation by the occupant for activating said transmitting means in the absence of the activating of said transmitting means by said sensing means; wherein (g) the first switch means, responsive to the release of the deadbolt, causes the transmitting means to enter a delay sequence prior to transmission of a signal to the control means for disconnecting the appliances from the source of energy; (h) the second switch means, responsive to the opening of the door when the deadbolt is in a released position, causes the transmitting means to transmit a signal to the control means for connecting the appliances to the source of energy; and (i) the third switch means, responsive to actuation by the occupant when the deadbolt is in a released position for activating said transmitting means to transmit said control signals to said control means.
 8. A device as recited in claims 1 or 7 wherein:(a) said appliances including thermostatically controlled heating and cooling means responsive to a first thermally responsive control means; (b) said control means comprises a second thermally responsive control means for controlling said heating and cooling means and operable at a different temperature range from said first thermally responsive control means, wherein (c) the temperature in said room is permitted to vary over wide ranges not normally acceptable for the comfort of the occupant during periods of absence of the occupant from the room, thereby providing further reduction in energy consumption in said room.
 9. A device for conserving energy consumption by appliances within a house when the house is unoccupied by an occupant, which device comprises:(a) a source of energy; (b) means for connecting the appliances to the source of energy; (c) control means for causing the connecting means to connect or disconnect the appliances and the source of energy; (d) sensing means responsive to the ingress to and egress from the house by the occupant; (e) wireless transmitting means activated and inhibited by the sensing means for transmitting control signals to the control means, thereby causing the appliances to be connected to or disconnected from the source of energy responsive to the ingress to or the egress from the house by the occupant; and (f) switch means responsive to activation by the occupant for activating said transmitting means in the absence of the activating of said transmitting means by said sensing means.
 10. The device of claim 9 wherein said appliances include:(a) thermostatically controlled heating and cooling means responsive to a first thermally responsive control means, (b) said control means comprising second thermally responsive control means for controlling said heating and cooling means and operable at a different temperature range from said first thermally responsive control means, and wherein (c) the temperature in said house is permitted to vary over wide ranges not normally acceptable for the comfort of the occupant during periods of absence of the occupant from the house, thereby providing a reduction in energy consumption in said house.
 11. The device of claim 9 wherein said appliances comprise detecting means for indicating unauthorized entry into said house.
 12. The device of claim 9 wherein said appliances comprise detecting means for indicating the existence of a fire in said house.
 13. The device of claim 9 wherein said appliances comprise detecting means for indicating the existence of smoke within said house. 